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What is an Herbarium?
Genus Descriptions
Species Descriptions
Ontario FEC V-Types
Bibliography
Terminology
Who Collects the Plants?
Collector Biographies
Nomenclature Primer
Website Information
Northern Ontario Plant Database
Leaf Bases
Attenuate
a tapering base with concave margins that form an angle less than (<) 45 degrees.
Narrowly cuneate
a narrow base with straight or convex margins that form an angle less than (<) 45 degrees.
Truncate
a broad straight base, abruptly ending at right angles to the midvein.
Oblique
an asymmetrical base with unequal size lobes, attached to the midvein at different levels.
Cuneate
a wedge-shaped base with margins that form an angle less than (<) 90 degrees, but greater than (>) 45 degrees.
Obtuse
a blunt base with margins that form an angle greater than (>) 90 degrees.
Rounded
a curved base with margins that form a smooth arc.
Cordate
a base with prominent, rounded lobes, cut ? to ¼ of the distance to the centre of the leaf blade.
Auriculate
a base with small rounded (ear-like) lobes.
Hastate
a base with pointed lobes directed outwards.
Sagittate
a base with pointed lobes directed downwards.
Divergent
a base with short, straight-sided lobes directed outward.
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